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Find Insulation pros in Iowa City

Avatar for Energy Nerds
Energy Nerds
4.6(
20
)

Serving Iowa City, IA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Amazing response and amazing job done, in a short amount of time. I have known for awhile that I needed more insulation in the attic. I started to search for insulation companies in the area. I quickly started seeing a pattern with reviews on other companies. All of them were, "called 15 times, never called back", "agreed on a start date but never showed up", "showed up but didn't know what was needed"... I was dreading making any decision on who to call. But then finally a company stood out above all the rest, Energy Nerds. I called Mike and left a message. He called back within an hour and even apologized for not calling back sooner! What?!? I called him on a Friday afternoon, he said he would be out Sunday afternoon and the job was completed by that evening! Truly amazing work done in a short amount of time. Mike and Dustin are great friendly people. Very knowledge in cutting edge technology to help you save money with energy costs. Mike is well informed so if you have any other energy saving needs, please talk with him. I would not hesitate to hire them again. Truly a pleasure to work with."
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+22

Response time2 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Halo Design Build, LLC
Halo Design Build, LLC
5.0(
5
)

Serving Iowa City, IA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"John is very knowledgeable about the product and answered all our questions /concerns in a timely manner. The staff was professional and friendly. Would highly recommend this company."
Mission
Sprayfoam
Mission
Cabin
Cabin

+38

Response time2 days
1 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Retrofoam Iowa, Inc.
Retrofoam Iowa, Inc.
4.3(
44
)

Serving Iowa City, IA and surrounding areas

In business since 2000

Free estimates

Warranties offered

"Brian came to the house and gave me a quick estimate, and he scheduled our job very quickly. The crew was early and got the job done timely. They cleaned everything up when they finished."
 Remove siding, inject product, replace siding.
 We fill the entire space...
 Between the studs-sealing the home
Homes we have insulated
Homes we have insulated

+6

Recommended by100%of homeowners
Avatar for ENERGY NERDS IOWA LLC
ENERGY NERDS IOWA LLC
4.4(
52
)

Serving Iowa City, IA and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"Jacob was friendly and knowledgeable when he came and gave us our insulation estimate. The two young men that came and did the installation were friendly and did the work efficiently and knew their job well."
Des Moines New Const.
Solar Fan in Burlington Iowa
Solar Fan install
Invisaflects Heat Reflective Coating on a cape cod
Energy Nerds 2018 Super Service Award

+6

Response time2 days
Recommended by93%of homeowners
Avatar for Preferred Home Improvements
Preferred Home Improvements
4.7(
12
)

Serving Iowa City, IA and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Dillon was a great guy and worked fast and efficient. My house is 50 plus years old and the duct work had never been cleaned. Post the work, the house even smelled better. I am in the middle of a complete remodel and living in the house. I had all 11 vent grilles removed -(saved Dillon a pile of time not having to remove and re-install) and I would have thought a discount would have been in order."
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+30

Recommended by100%of homeowners
Avatar for DeNeve Construction
DeNeve Construction
4.2(
60
)

Serving Iowa City, IA and surrounding areas

In business since 1995

Free estimates

Credit card accepted

"I got three estimates and went with Deneve. I am pleased with my choice, and after 3 years and still glad. Our neighborhood had a hailstorm and everyone needed new siding. Although Deneve had more customers in line, waiting for their house to get new siding, I never felt that they rushed or in any way compromised the job just to hurry on to the next one.The craftsmen  were all very punctual, professional and picked up after themselves really well. There was a younger guy who seemed to be new and he was carefully supervised, positively supported and was a great addition to the work group. Just as important as the good job they did with the siding, they helped me solve 2 problems I'd been having with the house: Birds kept building nests at the top of the brick columns on my front porch so they fashioned a solution with metal break.  I had previously had an occasional leak from rainwater getting behind my old siding during hard rainstorms. They took special care with the siding in that area and have said that if that happens again with their siding they stand behind their work and will come remedy it."
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+2

Recommended by85%of homeowners
Showing 1-10 of 22

FAQs for insulation service projects in Iowa City, IA

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.

The Iowa City, IA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

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